Trim cover of supplementary restraint system and installed on car steering wheel

Abstract

A trim cover of a supplementary restraint system and installed on a car steering wheel comprises a trim cover body, wherein a square wide groove is formed in the middle position of the rear part of the trim cover body to form a reduction structure, two short reduction lines are arranged on two sides of the square wide groove, and a hammer-shaped groove is formed in the periphery of the trim cover body. According to the trim cover of the supplementary restraint system and installed on the car steering wheel, a traditional unfolding method of the supplementary restraint system is changed. A tearing line design is not adopted on the trim cover, the reduction structure of the square wide groove is formed in the rear part of the trim cover and as a flipping rotary shaft, material which the square wide groove is made of is pretty thin, and the square wide groove plays a role as the rotary shaft in a flipping process. Due to the adoption of the flipping structure, the periphery of the trim cover and a shell body of the supplementary restraint system are clamped through the hammer-shaped groove and a hammer-shaped head, the traditional unfolding method of the supplementary restraint system is changed, and the supplementary restraint system is easy to open. Meanwhile, due to the fact that the two short reduction lines arranged on the two sides of the wide groove are located behind the trim cover, surface quality of the trim cover is not affected even if injection molding shrinkage marks exist.

Description

technical field [0001] The invention relates to a decorative cover of a safety air bag installed on an automobile steering wheel. Background technique [0002] The existing airbag decorative cover is provided with a weakening line structure. When the airbag is deployed, the decorative cover is torn from the position of the tear line. Since the thickness of the material at the position of the tear line is thinner than that of the surrounding material, the width of the tear line is relatively narrow. Therefore, during the injection molding process, the surface of the decorative cover is prone to injection molding sink marks, which affects the surface appearance quality of the decorative cover. Contents of the invention [0003] The object of the present invention is to overcome the above-mentioned defects and provide a decorative cover mounted on an airbag, which is easy to open and improves the surface appearance quality of the A side of the decorative cover. [0004] Tech...

AI Technical Summary

Problems solved by technology

[0002] The existing airbag decorative cover is provided with a weakening line structure. When the airbag is deployed, the decorative cover is torn from the position of the tear line. Since the thickness of the material at the position of the tear line is thinner than that of the surrounding material, the width of the tear line is relatively narrow. Therefore, during the injection molding process, the surface of the decorative cover is prone to injection molding sink marks, which affects the surface appearance quality of the decorative cover.

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